四、mycat垂直分库

系列导航

一、Mycat实战---为什么要用mycat

二、Mycat安装

三、mycat实验数据

四、mycat垂直分库

五、mycat水平分库

六、mycat全局自增

七、mycat-ER分片

一、实验环境

垂直分库
实验环境      服务内容    dataNode     
192.168.0.1 mycat         dn162
192.168.0.2 mysql         dn163
192.168.0.3 mysql         dn164

二、实验内容

1、数据库环境及用户名密码见mycat实验数据 

2、配置 schema.xml 

<?xml version="1.0"?>
<!DOCTYPE mycat:schema SYSTEM "schema.dtd">
<mycat:schema xmlns:mycat="http://io.mycat/">
        <schema name="demo_db" checkSQLschema="false" sqlMaxLimit="100">
              <table name="order_master" primaryKey="order_id"   dataNode="dn163"  />

              <table name="customer_inf" primaryKey="customer_inf_id"   dataNode="dn164"  />
         </schema>

        <dataNode name="dn163" dataHost="mysql163" database="order_db" />
        <dataNode name="dn164" dataHost="mysql164" database="customer_db" />

        <dataHost name="mysql163" maxCon="1000" minCon="10" balance="0"   writeType="0" dbType="mysql" dbDriver="native" switchType="1" >
                <heartbeat>select user()</heartbeat>
                <!-- can have multi write hosts -->
                <writeHost host="192.168.0.2" url="192.168.0.2:3306" user="im_mycat"   password="123456">
                </writeHost>
        </dataHost>

        <dataHost name="mysql164" maxCon="1000" minCon="10" balance="0"   writeType="0" dbType="mysql" dbDriver="native" switchType="1" >
                 <heartbeat>select user()</heartbeat>
                 <!-- can have multi write hosts -->
                <writeHost host="192.168.0.3" url="192.168.0.3:3306" user="im_mycat"   password="123456">
                </writeHost>
        </dataHost>

</mycat:schema>

3、配置service.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mycat:server SYSTEM "server.dtd">
<mycat:server xmlns:mycat="http://io.mycat/">
     <system>
        <property name="serverPort">8066</property>
            <property name="managerPort">9066</property>
            <property name="bindIp">0.0.0.0</property>
            <property name="nonePasswordLogin">0</property> <!-- 0为需要密码登陆、1为不需要密码登陆 ,默认为0，设置为1则需要指定默认账户-->
            <property name="charset">utf8</property>
            <property name="txIolation">2</property>
            <property name="processors">8</property>
            <property name="idleTimeout">300000</property>
            <property name="sqlExecuteTimeout">300</property>
            <property name="useSqlStat">0</property>  <!-- 1为开启实时统计、0为关闭 -->
            <property name="useGlobleTableCheck">0</property>  <!-- 1为开启全加班一致性检测、0为关闭 -->
            <property name="sequnceHandlerType">2</property>
            <property name="defaultMaxLimit">100</property>
           <property name="maxPacketSize">104857600</property>
  </system>
  <user name="mycat_user" defaultAccount="true">
           <property name="password">123456</property>
           <property name="schemas">demo_db</property>
  </user>
</mycat:server>

4、启动mycat看是否正确
   [root@zhu mysql]# su mycat
   [mycat@zhu mysql]$ mycat start
   Starting Mycat-server...  

   192.168.0.1上使用root和mycat用户都可以
   >mysql -h 192.168.0.1 -P 8066 -umycat_user -p123456
   mysql> show databases;
+----------+
| DATABASE |
+----------+
| demo_db  |
+----------+

mysql> use demo_db
Database changed
mysql> show tables;
+-------------------+
| Tables in demo_db |
+-------------------+
| customer_inf      |
| order_master      |
+-------------------+

插入数据
先清空192.168.0.2上order_master，192.168.0.3上customer_inf表的数据；
在192.168.0.1上插入数据
insert into order_master(order_id,order_sn,customer_id,shipping_user)values(1,'20190845125425',  1 ,'张三');
insert into order_master(order_id,order_sn,customer_id,shipping_user)values(2,'20190845125426',  2 ,'李四');
commit;

insert into customer_inf(customer_inf_id ,customer_id,customer_name)values('3','5','王五');
insert into customer_inf(customer_inf_id ,customer_id,customer_name)values('4','6','杨六');
commit;

插入的数据在192.168.0.1上都可以看到
order_master的数据在163上可以看到
customer_inf的数据在164上可以看到
说明垂直分库成功

5、配置全局表
之前region_info表在192.168.0.2，192.168.0.3上已经建立好了

配置 schema.xml
添加
<table name="region_info" primaryKey="region_id"   dataNode="dn163,dn164"  type="global" />

重启mycat
mycat stop
mycat start

192.168.0.1上登录mycat  插入数据
[mycat@zhu ~]$ mysql -h 192.168.0.1 -P 8066 -umycat_user -p123456
mysql> use demo_db;
Database changed
mysql> show tables;
+-------------------+
| Tables in demo_db |
+-------------------+
| customer_inf      |
| order_master      |
| region_info       |
+-------------------+
3 rows in set (0.01 sec)

insert into region_info(region_name )values('乌鲁木齐');
insert into region_info(region_name )values('昌吉');
commit;

之后在192.168.0.1，192.168.0.2，192.168.0.3都能查到数据说明配置成功